Elastic tire for autocars.



No. 639,|56. Patented Dec. I2, I899.

A. DUCASBLE.

ELASTld TIRE FOR AUTUCARS.

(Application fl 1l ad June '7I 1899.)

(No Model.) I

Tn; ncnms PzrzRs co, mom-uma. WASHINGYON. 0.0.

ITE STATES PATENT OFFICE.

MENTS, TO CLAYTON E. PLATT, TRUSTEE, OF

VAN IA.

ELASTIC TIRE FOR AUTOCARS.

SPECIFICATION forming part of Letters Patent N 0. 639,156, datedDecember 12, 1899. Application filed Tune 7, 1899. Serial No. 719,688.(No model.)

To all whom it may concern:

Be it known that I, ALFRED DUoAsBLE,

a citizen of the Republic of France, residing at Asnieres, (Seine,)France, have invented a certain new and useful Improvement in ElasticTires for Antocars and other Vehicles, (for which I have seen redLetters Patentin France, dated December 6, 1898, No. 283,746, and inGermany a petty patent, dated December 19, :o 1898, No. 108,055, in thename of Rudolf Schmidt;) and I do hereby declare that the following is afull, clear, and exact specification of the same.

The present invention has for its object a hollow tire for autocar andother vehicle Wheels. It is so constructed that the tread thereof alwayshas an invariable width whatever may be the weight which the tire mayhave to carry, that the tire offers a maximum resistance for a minimumvolume and weight, and that it ofiers great resistance against sideslipping.

' The annexed drawing is a cross-section of a hollow tire made accordingto my invention. This tire consists, as shown, of a band or ring a, madeof rubber or other suitable material, having an interior chamber orspace I) of any suitable shape. The section of the tire assumes, asshown, an irregular hexago- 0 nal form-that is to say, the tread c,which comes in contact with the ground, is flat and is of a width lessthan the base d, which rests upon the rim (not shown) of the wheel. Fromthe base (Z project, perpendicularly thereto, the vertical sides 6 e,which are connected with the tread c by two oblique parts or abutmentsff.

The inclination of the abutments ff with regard to the vertical line isso calculated as to give a maximum resistance for a minimum of volumeand weight of the tire. The said inclination will, besides, have thegreat effect of presenting a great resistance against side slipping.

It will readily be seen upon examining the drawing that the treadc--that is to say, the friction-facewill, furthermore, retain aninvariable width Whatever may be the Weight the tire may have to carry,as the bending of the tire taking place on the lateral oblique parts ffthey will under pressure undergo a swelling, as indicated in dottedlines in the drawing, but Without coming in contact with the ground.

It will also be understood that the tire may be closed all around theinner space 1?, as shown in full lines, or that it may be open along itsinner periphery at the middle of the base d, as indicated by g in dottedlines.

An elastic tire for vehicles having parallel horizontal faces 0 dconstituting the tread and base of the tire, said face 0 of lesstransverse area than said base, parallel vertical sides 6 and sides fconverging from said sides 6 to the tread, said tire provided with acircular arched chamber 1) nearer to the base than the tread,substantially as and for the purpose set forth.

In Witness whereof I have hereunto set my hand, this 27th day of April,1899, in the presence of two subscribing witnesses.

ALFRED DUOASBLE. Witnesses:

D. HORACE BRANDON, EDWARD P. MACLEAN.

PHILADELPHIA, PENNSYL-

